Pump jack



PUMP JACK Filed March 17, 1926 CII CII

l Patented `lune 14, 1927.

narran STATES nnlvronn n. KINSEY, or san ANGELO, '.rnrz'ns.Y

ZPUMP JACK.

Application led March 17,1926. Serial No. 95,373.

TWhile the drawings illustrate apreferred embodiment of the invention it is to be understood that in adapting the means to meet specific needs and requirements, the design may be varied and such other' changes .in the if minor de'ails of construction may bey resorted to within the scope of the invention as claimed, without departing from the spirit thereof.

For a full understanding of the inven- 1-5 tion and the merits thereof, reference is to be had to the following description and the drawings hereto attached, in which- Figure 1 is a top plan view of a pump jack embodying the invention,

Figure 2 is a front view of the jack,

Figure 3 is a side view of the jack, the drive shaft being in section,

Figure l is a detail sectional view of a portion of the endless member and pump rod on the line 1 4 of Figure 2, and

Figure 5 is an enlarged sectional view on the line 5-5 of Figure 2. *Y corresponding and like parts are referred to in the following description and desig- 30 natcd in the several views of the drawings by like reference characters.

rEhe jack comprises a head which includes a hase 'l and spaced uprights 2. Brackets 3 are provided at the upper ends of the upright and shafts t are mounted in the upper ends of the brackets and uprights. The shafts 4 are intransverse alinement and each has a spur gear 5 and a sprocket whe-el 6 fast thereto. The spur gears 5 are disposed between the brackets 3 and uprights 2. The sprocket wheels 6 are located at the inner ends of the shafts. Other shafts 7 are mounted in the lower portion of the uprights in transverse aline ment and are provided at their inner ends with sprocket Wheels 8 which are fast thereto. A yoke 9 is provided with outwardly disposed bearings 10 in which the shafts .7 are mounted. The bearings 10 are received in vertical slots 11 of the uprights 2 and are adjustable vertically and are held in the adjusted position by suitable means such as screws l2 which are threaded into the bearings 10 and pass through slots 13 formed in the uprights 2. Endless chains 11i pass around the sprocket wheels 6 and 8 and con stitute the endless member for operating the pump rod.

A pin 15 is supported at its ends in trans versely alined links of the endless chains lll and the pump rod 16 is connected to the endless member by means of the pin 15. A coupling 17 is bolted or otherwise secured to the pump rod 16 and receives the pin 15 which passes through an opening formed therein. it is observed that there is an unobstructed space between the endless chains 1st which provides clearance for the pump rod 16 which travels upwardly and down wardly and between the runs of said chains when the .jack is in operation. A drive shaft 18 mounted in bearings at the upper ends of the uprights 2 is provided with spur piuions 19 which are in mesh with the spur gears 5 and in this manner, both shafts 4 are uniformly rotated. The drive shaft 18 may be operated in any manner, either by hand or motor, and when driven from a suitable source of power, a drive belt, not shown, coacts with a drive pulley 20 fast to the shaft 1S. When the jack is in operation the elements 14 of the endless member are uniformly rotated, thereby causing the pin 15 to `travel upwardly and downwardly and the pump rod 16 connected to said pin receives a corresponding reciprocatory movement, thereby resulting in operation of the pump in a manner well understood.

Having thus described the invention, I claim:

1. A pump jack comprising a head, including spaced uprights formed with longitudinal slots, ayoke having outwardly disposed bearings received in the slots of the uprights, shafts mounted in the bearings of the yoke and spaced apart at their inner ends, other shafts .mounted in the upper ends of the said uprights and spaced apart at their inner ends, sprocket wheels upon the inner ends of the respective shafts, endless sprocket chains connecting the sprocket wheels of corresponding shafts, a pin connected at its ends with the sprocket chains, and a pumprod connected to the said pin;

2. A pump jack comprising` a head, including a base, spaced uprights rising from the base and formed with intersecting longitudinal slots, and bracketsat the upper ends of the `uprights, transverse'shafts mounted in the saidbrackets and uprights and spaced apart at` their inner ends, spur gears fastto the shafts intermediate the brackets and uprghtsfa driveshaft mounted nthe uprghts, pnon's fast to the `drive shafteX- teror to the uprghts and in mesh with the said spur gears, sprocket Wheels fastto the nne1` ends. of the transverse shafts, a yoke having outwardly disposed bearings received in slots of the uprghts, means operating n slots of the uprghts to secure the yoke in`l shafts mounted in the bearings of the yoke, 10

sprocket Chains, and a pump rod connected 15 to the said pin. In testimony whereof I ax my signature.

EDMOND E. KINSEY. [Ls] 

